EP 2646849 A4 20171018 - PRIMARY ESTIMATION ON OBC DATA AND DEEP TOW STREAMER DATA
Title (en)
PRIMARY ESTIMATION ON OBC DATA AND DEEP TOW STREAMER DATA
Title (de)
PRIMÄRE MESSUNG VON OBC-DATEN UND TIEFZUG-STRÖMUNGSDATEN
Title (fr)
ESTIMATION PRIMAIRE SUR DES DONNÉES OBC ET DES DONNÉES DE FLÛTES REMORQUÉES EN PROFONDEUR
Publication
Application
Priority
- US 41869010 P 20101201
- US 201161526541 P 20110823
- US 2011056163 W 20111013
Abstract (en)
[origin: WO2012074612A1] Method for correcting OBC or deep-towed seismic streamer data for surface-related multiple reflections. The measured pressure data, preferably after conditioning (71), are simulated using a forward model that includes a water propagation operator between source locations and receiver locations and a term representing primary impulse responses (72). Other terms include direct arrivals and source wavelets. Iterative optimization of an objective function is used to minimize the difference between measured and simulated data, updating the primary impulse response term and optionally the source wavelets term each iteration cycle (73). The converged primary impulses (74) are used to construct simulated multiples and direct arrivals (75), which can be subtracted from the measured data. Optionally the measured data might be blended during the forward simulation (72), to save computational costs in the forward simulation (72) and in the inversion (73).
IPC 8 full level
CPC (source: EP US)
G01V 1/364 (2013.01 - EP US); G01V 1/368 (2013.01 - US); G01V 1/38 (2013.01 - EP); G01V 2210/56 (2013.01 - EP US); G01V 2210/614 (2013.01 - EP US); G01V 2210/67 (2013.01 - EP)
Citation (search report)
- [I] US 5587965 A 19961224 - DRAGOSET JR WILLIAM H [US], et al
- [I] US 2010135114 A1 20100603 - TEAGUE ALAN G [US], et al
- [I] US 2010161235 A1 20100624 - IKELLE LUC T [US]
- See references of WO 2012074612A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012074612 A1 20120607; AU 2011337162 A1 20130620; AU 2011337162 B2 20141106; CA 2814921 A1 20120607; EP 2646849 A1 20131009; EP 2646849 A4 20171018; SG 189851 A1 20130628; US 2013242696 A1 20130919; US 9383466 B2 20160705
DOCDB simple family (application)
US 2011056163 W 20111013; AU 2011337162 A 20111013; CA 2814921 A 20111013; EP 11845130 A 20111013; SG 2013026091 A 20111013; US 201113989754 A 20111013